Hello! I see you're having trouble logging into your UBA app because the phone number you’ve been using is now showing as a wrong phone number. Let’s look into this carefully so we can find the best solution for you.

To get us started:
- Have you recently changed your phone number or SIM card?
- Are you trying to log in with the same phone number you initially registered with the app?
- Is this issue happening just on the app, or do you also have trouble receiving alerts or transactions notifications on that number?

This info will help me guide you more precisely. Meanwhile, here’s a common cause and what you might try next:

1. Phone number update: If the phone number linked to your UBA account has changed, the app will not recognize the old one. UBA requires that the phone number on record matches the number used for logging in and alerts.
2. Re-register on new device or number: Sometimes, if you get a new device or number, you’ll need to re-register your details in the UBA app. You can try uninstalling and reinstalling the app, then complete the registration afresh with the current phone number linked to your account.
3. Contact UBA to update your phone number: If your phone number has changed, the most straightforward solution will be to visit a UBA branch to update your alert number and linked phone details officially. Alternatively, you can reach out to UBA support via their customer service numbers for guidance: +234 700 2255 822 or +234 020128088222 3 4.

Please let me know your responses to the above and if you’d like, I can walk you through the re-registration steps or other troubleshooting options.